Apparatus for concentric punching.



A. LEGE'RE.

APPARATUS FOR CONCENTRIC PUNCHING. APPLICATION FILED OCT. 29, 1915.

2 SHEETS-SHEET ll0 WI TNESSESw Y". :flz W fiizlasfieyera; I I f ATTORNEY.

THE COLUMBIA PLANDGRAPH 50., WASHINGTON, D. C.

A LEGERE APPARATUS FOR CONCENTRIC PUNCHING.

APPLICATION FILED OCT- 29, 1915.

Patented Feb. 8,1916.

2 SHEETS-SHEET 2- 2/ l a I v QWWEWWW ll Y WITNESSES:

' 11v VENTOR.

A TTORNE Y.

' AMOS LEGERE, 0F

sou'rrr BETHLEHEM, rENNsYLvANIA, :ASSIGNOR 0E ONE-HALF To eEovE BUTZ, or BETHLEHEM; PENNSYLVANIA.

APPARATUS FOR coNoENTEIc ruNc'HING;

i Specification of Letters Patent.

' Patented Feb'.8,1916.

" Application filed October 29,1915. 'Serial 110, 58,565. r

To all whom it may concern:

Be it known that 'LAMos LEGERE, a subject of the King of Great Britain, residing in South Bethlehem, in the county of North Hampton and State of'Pennsylvania, have inventeda certain new and useful Improved Apparatus for Concentric Punching, of which the following is a specification Thev principal. object of the present invention is to provide apparatus for the concentric punching of shrapnel casings and to that end embraces a punching die, stripper and centering collar so disposed, arranged and connected as to providea more efficient and commercially valuable punching apparatus than like apparatus now 1n general use.

Other and further objects of the present invention reside in the providing of general details of construction and in the arrange ment of parts as will hereinafter more fully appear.

With these and other objects in view, the

I invention consists of the improvements hereinafter described and finally claimed.-

The nature, characteristic features and V v taken in connection with the accompanying collar.

drawingsforming part hereof and in which: Figure 1, 1s a view 111 central section of so much of the apparatus as 1s necessary to the understanding of the invention, and

illustrating the centering operation. Fig. 2, is a top or plan view of the centering Fig. 3, is a side elevational View thereof. Fig. 4, is a top or plan view of the stripper. Fig. 5, is a side elevational view thereof. Fig. 6, is a top or'plan view of the punching die. Fig. 7, is a side elevationalview thereof. Fig. 8, is a fragmentary view illustrating the manner of punching a billet, and Fig. 9, is a similar view illustrating a billet as finally punched.

For the purpose of illustrating my invention, I have shown in the accompanying drawings one form thereof which is at present preferred by me, since the same has been stood that the various instrumentalities of which my invention consists can be variously 1 arranged and organized and that my invention is not limited to the precise arrangepose of which will presently appear.

ment and organization of the instrumentalitles as herein shown and, described.

" In the drawings 10,- designates a die holder of any preferred construction. Mounted therein 1s the punching die 11, of the presentinvention. This'diell, is of cylindrical formation and is provided with a central bore 12 downwardly tapered to-receivea' billet 13. The die 11, is'further provided with anon centric tapered counter bore 14, V

to accommodate the tapered boss 15, of a stripper16, This stripper comprises a solid portion 17, from which the boss 15, depends and which solidportion hasprojected therefrom'a handle 18. Concentrically arranged with respect to'the boss 15, and extended ver-' ticallythrough the stripper is abore 19, the diameter of which is of the same diameter as the diameter of the lowest portion of the bore 12. 'Bythis construction, it will be noted that there is a slight overhang of the boss 15, at the-point designated a, the pur- The stripper 16, 'is held to place upon the die I, r

. 'holder 10," by suitable straps 2O. I Seated within the'bore of the stripper is the boss of a centering collar 21, the flat bottom of the collar resting upon the flat top of the stripper, a central bore concentric with the bores of-the stripper and punching die being I present throughthe collar 21. The punch '22, is of ordinaryconstruction I In using-the apparatus the die 11, is first placed within the die holder 10, and v the stripper 16, positioned sothat its boss snugly seats itself in'the counter bore' of the die.

The centering collarisfthen" positioned as" shown in Fig. 1. 'The punch 22, is then lowered through the collar and stripper. and into the die and the die holder is then ad- *justed so that the'largest diameter of the punch and the diameter of the bore of the collar are ineven register. The bolts 23, of

the die-holder are then tightened to clamp the. parts to'fixed position- The punchis then raised and the centering collar removed,

since said collar has no function'in the operation of punching. A billet 13',heatedto a temperature of about 1500 F. (a decisive yellow in color) is now fitted tothe bore of' the stripper 16, and thepunch lowered. As

'the billet is forced down throughthebore of said stripper any scale upon the billet is scraped therefrom'by the top edge of the stripper bore. In practice the depth of the die bore and the height of the billets are so proportioned that when the billet has reached its lowest level (see Fig. 8), the top of the billet is still engaged within a portion of the stripper bore. the billet the punch forces out the billet walls so that they. engage the tapered walls of the die. That portion of the billet which has been held within the bore of the strip per is accommodated by the space at the point designated a. As the billet is further punched, the Walls of the shrapnel casing being formed are forced upwardly around the .punch until finally the position shown in Fig. 9 is reached, at which time the operation of punching is completed andthe progress of the punch is stopped by well known mechanism, not shown in the drawings. The shrapnel casing now being completed, the punch is raised to its full height with the said casing clinging thereto. When the top of the stripper reaches an abutting position with the underside of the straps 20, the movement of the casing is stopped and as vsaid punch continues to move upward, said stripper strips the punch free of said casing. The stripper is now removed and the shrapnel casing lifted from the die.

It will now be apparent that I have devised a novel and useful construction which embodies the features of advantage enumerated as desirable in the statement of the invention and the above description and while I have in the present instance shown and described the preferred embodiment thereof which has been found in practice to give satisfactory andreliable results, it is to be understood that the same is susceptible of modification in various particulars without departing from the spirit orscope of the invention or sacrificing any ofits advantages. V I

What I claim is: v

In apparatus of the class noted, the combination 7 of an operativ'ely disposed punch, adie holder operative to be centered I the'rebeneath, adie having a central bore and boss has a central bore th'erethro'ugh, the

bore "of said collar, stripper-and d ie all being concentrically disposed in assembled position.

2. In apparatus of the class noted, the combination of "an operatively disposed punch, acl-ie holder'operative to be centered therebeneath, a die having a --cen't-ral "tapered bore and a concentric counter bore therein,

an elongated stripper embracing a solid por- In stamping of tion provided with a depending boss and an extension forming a handle, said boss being adapted for removable insertion in the counter bore of said die and the bottom of said boss being adapted to overhang said tapered bore and the said solid portion of the stripper including the boss having a central bore thereth'rough, and a centering collar having a boss for removableinsertion in the stripper bore which collar and boss has a central bore therethrough, the bore of said collar, stripper and dieall bein concentrically disposed in assembled position.

3. Apparatus of the class noted embracing a die having a counter-sunk cavity therein and a stripper equipped with a portion shaped for removable insertion within the counter-sunk portion of said cavity.

4. In apparatus of the class noted, the combination of an operatively disposed punch, a die holder operative to be centered beneath said punch, a die having a billet receiving bore, a stripper operatively fitted to said die and having a bore therethrough in concentric register with the die bore and a centering collar having a boss, which boss is adapted for removable insertion within the stripper bore, said'collar having a central opening therethroughof a diameter of substantially the same diameter as the greatest cross-section of said punch.

5. In apparatus of the class noted, the combination of an operatively disposed punch, a die holder, a die having a tapered billet receiving bore therein, which bore terpunch, a die holder, a die having a tapered billet receiving bore which bore terminates in a tapered counter bore and a stripper having a tapered boss adapted for removably fitting within said tapered counter bore, which stripper including said boss has a bore therethrough in concentric register with said die bore, the bottom of said boss having an overhang relation with said die bore.

7. Apparatus of the class noted embrad ing a die having a "cavity therein, a stripper equipped with a portion shaped for removable insertion within said cavity and a cente-ring collar removably seated upon and partially within said stripper.

8. Apparatus of the class stated embracing a die having a cavity therein, and a stripper equipped with a portion shaped for removable insertion within said cavity and constructed to slightly overhang the same.

9. Apparatus of the class noted embracing 10. Apparatus of the class noted embracing a punch, a die operative to be centered with respect thereto, said die having a counter-sunk cavity therein, a stripper shaped for removable insertion Within said coun-' ter-sunk portion of said cavity, said stripper having an opening therethrough concentrio ithsaid counter-sunk cavity, a centering medium having a punch passage therethrough shaped for removableinsertion Within the stripper opening for securing a position of said die coaxial With the aXlS of the punch and means for securing the said die in such coaxial relation. In testnnony whereof, signed my name.

' AMOS LEGERE.

Witnesses:

WILLIAM J. J Aoxson, W. C. VANDYKE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C.

I have hereunto 

